The utilization of chamfer in fattening mangrove crab, Scylla olivacea consuming feed GEL containing various shrimp paste origins as attractants with system of vertical crab house and RAS Edison Saade, Zainuddin, Abustang and Reski Wahyuni Sukardi*
UNIVERSITAS HASANUDDIN
Abstract
The price for mud crab cultivation with apartment technology or system of Vertical Crab House (VCH) is very expensive. One of the innovations to overcome this is to use chamfer. GEL feed is an artificial feed type semiwet containing sea weed, K. alvarezii as a thickening agent and a source of nutrition made by steaming. Shrimp paste can increase the attractiveness, feed consumption and weight gain of mangrove crabs. This research is an initial study to determine survival rate, feed consumption, feed efficiency, weight gain and condition factors for mud crabs reared in cahmfer with the Recirculating Aquaculture System (RAS) which are fed GEL from various different origins as an attractant with the VCH System or the system of apartment. The research was conducted at the Mini Hatchery of the Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, South Sulawesi. The test animals used were male mangrove crabs with an average weight of 108.45 10.23 g. Mud crabs are kept in a chamfer (size 100 x 13 x 11 cm) which is placed on a three-story iron rack. Each chamfer is partitioned in four using a wire net and each partition is filled with one crab. The study was designed using a completely randomized design (CRD) consisting of 4 treatments with 3 replications each, namely homemade shrimp paste called UNHAS product (treatment A), Malili shrimp paste (B), Selayar shrimp paste (C), and Kendari shrimp paste (D). Parameters measured were survival rate, feed consumption, daily relative growth rate, condition factor and feed efficiency. The results of the analysis of variance showed that the use of different shrimp paste sources had no significant effect (p>0.05) on survival, feed consumption, growth, feed efficiency and condition factors for mud crabs. Based on the results of this study it was concluded that all shrimp paste as an attractant and a source of nutrition could be supplemented in GEL feed for fattening mud crabs in chamfers with VCHS and RAS.
Keywords: Attractant, fattening, gel feed, mangrove crab, Recirculating Aquaculture System (RAS)
